Door type heater for combustion chambers



@c3 8, 1935. R. F. VAN SEGGERN DOOR TYPE HEATER FOR COMBUSTION CHAMBERS Filed Nov 11, 1932 2 Sheets-Sheet l 3nnentor DOOR TYPE HEATER FOR COMBU STION CHAMBERS Filed Nov. 11, 1932 2 Sheets-Sheet 2 Patented Oct. 8, 1935 UNITED STATES PATENT ()FF'ICE DOOR TYPE HEATER FOR COMBUSTION CHAMBERS The present invention relates to improvements in door type heater for combustion chamber, and relates more particularly to a water heater for use in furnaces.

One of the objects of the invention is to pro-- vide an improved water heating unit for domestic or other furnaces adapted to be carried or supported'in the fire door opening another object of the invention is to provide a heating device capable of being introduced through the ordinary fire door opening without involving any changes in the conventional form of the furnace or boiler.

A further object of the invention is to provide a heating device adapted to be connected to the boiler to increase the circulation of water therethrough.

Another object of the invention is to provide elements capable of assembly within the combustion chamber of the boiler and adapted for use with boilers of various sizes and types.

. Another object of the invention is to provide an inexpensive form of water heater which will involve a minimum installation cost.

The invention may also embody an induction heater for the supplying of domestic hot water.

With the foregoing and other objects in view,

the invention will be more fully described hereinafter, and will be more particularly pointed out in the claims appended hereto.

In the drawings, wherein like symbols refer to like or corresponding parts throughout the several views,

Figure 1 is a fragmentary perspective view with parts broken away and parts shown in section illustrating a boiler with a typical embodiment of the improved apparatus incorporated therein. Figure 2 is a front elevation of the heating unit taken on an enlarged scale.

Figure 3 is a vertical longitudinal section taken on the line 3-3 in Figure 2.

Figurel isfa similar view taken on the line 4-4 in Figure 2.

Figure 5 is a cross 55 in Figure 3.

Figure 6 is a vertical section taken through the front header of the domestic Water heater, and

Figure '7 is a similar view taken through the rear header thereof.

Referring more particularly to the form of the invention illustrated in the drawings, Iii designates a boiler of any appropriate type for domestic or-other heating uses and including a cornbustion chamber l I having an opening I2 in the front through which an oil burner may be insection taken on the line stalled. Of course, any other type of fuel may be used in order to heat the combustion chamber. The conventional boiler is provided with a steam dome l3 and a riser pipe [4 for conveying steam,

hot water or either to the heating system and 5 radiators throughout the building.

In accordance with the invention the old fire door is removed and a substitute unit frame is installed over the present conventional frame around the door opening which supports the substitute unit frame.

The unit frameincludes a bottom wall l5, side Walls 16 and a top wall H, such walls confining an enlarged space at the outer portion of the door frame. This space is enclosed at the outer sideby an enclosure plate l8, shown in Figure 2, secured in any desired manner to flange l9 with a gasket seal extending all about the flanged Walls of the enclosure frame under plate l8. A casing carried by the frame extends into the combustion chamber of the boiler and preferably is located at one side of the door thereof as shown. A horizontal partition 23 divides the space within the easing into a lower compartment 2| and an upper compartment 22. The lower compartment is adapted to receive water through a water inlet pipe 24, connected to the lower portion of the boiler. The upper compartment above the partition 23 connects with a hot water and steam pipe 25. This pipe 25, as shown in Figure l, empties into the steam dome is at a point remote from the riser M.

The vertical partition [9' is carried outwardly all around beyond the walls l5, l6 and H and constitutes a projecting flange 26, which flange adds strength to the structure and against which asbestos sealing compound or furnace cement, indicated at 21, may be built.

The adjacent furnace wall is represented at 28 on which furnace wall the conventional door frame is secured and forms a flange as at 29 to extend within the walls I5, l6 and I! of the substitute unit door frame.

The water compartments above and below the horizontal partition 23 may be extended as to capacity to any amount desired by the adding of sections 30 and 3!. These sections may be tubular and are preferably of a semi-cylindrical form. As many intermediate sections 39 may be provided as required and an end section 3| having a closed head 32 will be installed at the end for the purpose of closing the device. A rod 33 may extend in common through the various sections and through the 'door frame, such rod being threaded in the rear head 32 and passing through 55.

the front plate l8 to receive a nut 34 preferably occupying a recess in the plate I8. By turning the nut 35 the sections may be pulled tightly together or released. Rods 33 being submerged in water contained in the sections and door frame unit protects said rods against excessive expansion and contraction thereby eliminating any possibility of leaks due to overheating of the tie rods 33.

The various sections are secured together by push nipple assemblies consisting of inner rings 35 having outer curved surfaces for mating with similarly curved surfaces in the openings at the ends of the sections. Appropriate compound may be placed between the rings 35 and the curved walls of the sections, and such compound will form an effective seal when the sections are drawn together upon the rings.

The sections 36 and 3! receive pipes 36 and 3?. The pipes 38 are formed in small loops. The upper ends of these pipes are engaged through the sections 30 and 3| near the lower parts thereof and the other ends of the pipes 36 being engaged in the lower sections 38 and 3P which form continuations of the cold water inlet compartment at the front of the unit. The pipes 3'! envelop the pipes 36 and are similarly looped but in considerably larger formation. The upper ends of the pipes 3! connect with the sections 38 and 3i at the upper portions thereof. The lower ends of the pipes 3'! connect with the sections 3% and 3H below the points of connection of pipes 35. These pipes 36 and 31 extend sidewise from the sections into the combustion chamber II of the furnace and they offer a large surface area against which the heat and products of combustion may react to heat the Water contained in these pipes or convert the same into steam.

An induction heater for domestic hot water is also preferably included in the device and it occupies the upper sections 30 and 3| and the hot water outlet compartment of the front of the device. Such induction heater includes a front header 38 and a rear header 39 connected by pipes 40 and 4!. The front header 38 is connected by inlet and outlet pipes 42 and 43 respectively, such pipes extending through one of the side walls of the front frame.

The front header section of the induction header 33 is divided into an upper and lower compartment by a partition 60 whereby the cold water coming in through pipe 42 is introduced into the lower compartment of this header 3B. Thence through the two large tubes 4|, by which the water is conveyed to the rear header 39. This rear header 39 forms only one general compartment whereby the water may flow back through the numerous pipes 40 of small diameter. In this way the water gets to the upper compartment of the front header 38 from which such hot water is drawn off by means of the pipe 43.

The pipe 42 connects with the lower portion of the hot water storage tank while the pipe 43 leads to the upper portion of the hot water storage tank. The induction heater is supported on upper rods 33 which extends through the entire assembly.

As shown in Figure 3, the unit door 44 is mounted upon the unit frame. This door is hinged to the frame at two points on top wall ll. Door 46 is so designed that when closed it overlaps the walls I5, l6 and I! thereby preventing the leakage of any fumes from the boiler.

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Furthermore, the door has a finger grip in the center at the bottom and is heavily weighted which so balances the lower side of the door that it automatically closes by force of gravity when released, which is a protection from any liability of the door remaining open by accident or negligence. The inner side of door 44 is lined with asbestos board or some other suitable insulating material to prevent overheating or warping of the door. In the use of the device, cold water enters through the pipe 24 into the lower cold water compartment of the front frame and passes into the lower sections 30* and 3H. From these lower sections the water circulates out through the pipes 36 and 3'! which are numerous and of small diameter. These pipes are, of course, sub:- ject to the products of combustion and the wais rapidly heated and ascends upward through these pipes into the upper sections 30 and 3!. The water entering these upper sections is steam laden and comes in direct contact with the numerous tubes of the induction heater assembly and flows laterally forward through sections 3i and 33, thence to the door frame unit, during which time the water is in direct contact with the entire induction heater unit, which induces marked temperature rise in the domestic hot water carried in the tubes of the induction heater. From this point the unit water passes out through pipe 25 upward into the steam dome l3 and some of the water will rapidly expand into steam due to the construction of the unit heater and will promote rapid circulation throughout the boiler.

At the same time this hot water will be circulated in and about the induction heater and will raise the temperature of the water in this induction heater to that requisite for domestic use.

As many of the sections 30, 30, 3| and 3| may be added as the internal dimensions of the combustion chamber of the boiler will permit. These sections are readily introducible into the opening in front of the furnace after the ordinary door has been removed. They may be assembled within the furnace to one another and to the front frame section. The device forms a .compact unit, so adapted as to be supported by the fire door opening and insertible through the fire door frame. The arrangement of the pipes 50 36 and 31 within the combustion chamber may differ widely in form.

It is obvious that various changes and modifications may be made in the details of construction and design of the above specifically described embodiment of this invention without departing from the spirit thereof, such changes and modifications being restricted only by the scope of the following claims.

What is claimed is:-

1. An improved water heater comprising a door frame for combustion chambers having a casing formed with upper and lower compartments, means for introducing water into the lower compartment, means for drawing off water 5 from the upper compartment, upper and lower hollow sections connected to said casing and in line with the respective upper and lower compartments, pipes connecting said upper and lower sections, and an induction heater contained in the upper compartment and sections.

2. An improved water heater comprising a door frame having a casing partitioned to provide lower and upper compartments, a removable plate for closing the front portions of the compartments, hollow upper and lower sections communicating with the respective compartments and with one another, the end sections having closed heads, rods threaded in said closed heads and extending through the sections and the compartments and through said plate, nuts on the rods in front of the plate, pipes extending between the upper and lower sections, and an induction heater in the upper compartment and sections carried on the rod therein and including front and rear headers and pipes between said headers.

3. In combination with a boiler, a supplemental heating device, an element through which heated water from said supplemental heating device is passed to said boiler and an induction heater positioned to be heated by water passing through said element.

4. In combination with a boiler, a supplemental heating device, an element through which heated water from said supplemental heating device is passed to said boiler and an induction heater located within said element.

5. In combination with a boiler, a supplemental heating element through which water is passed to said boiler including pipes located in the combustion chamber of the boiler, and an induction heater positioned to be heated by water passing from said pipes to the boiler.

6. In combination with a boiler, a supplemental heating element through which water is passed to said boiler including pipes located in the combustion chamber of the boiler, an inlet conduit for water to be heated in said pipes, an outlet conduit into which water heated in said pipes is discharged and an induction heater located in said outlet conduit.

7. An improved water heater adapted to be applied to a boiler to increase the circulation of the boiler water comprising a casing provided with a partition dividing the same into upper and lower compartments to which boiler water may 5 be supplied, sections communicating with said compartments and water heating tubes extending into the combustion chamber of the boiler and providing communication between said sections.

8. An improved water heater comprising a casing adapted to be located in a boiler and formed with upper and lower compartments, means for supplying cool boiler water to the lower compartment, means for passing heated water from the upper compartment to the boiler, sections located in the combustion chamber extending end to end and communicating with the compartments in said casings, and water heating tubes carried by said sections and providing communication between those sections communicating with the lower compartment and those sections communicating with the upper compartment.

9. An improved water heater comprising a casing having a horizontal partition dividing the interior thereof into upper and lower compartments, hollow sections located in the combustion chamber and communicating with each of said compartments, means for holding said sections together and tubular means extending laterally from said sections and providing communication between those sections communicating with the lower compartment and those sections communicating with the upper compartment.

RAY F. VAN SEGGERN.' 

